Chemistry, 14.10.2019 21:30 masaiyahrhemanow

Which statement describes the general trends in electronegativity and atomic radius as the elements in period 2 are considered in order from left to right?

(1) both electronegativity and atomic radius increase.
(2) both electronegativity and atomic radius decrease.
(3) electronegativity increases and atomic radius decreases.
(4) electronegativity decreases and atomic radius increases.

Answers: 2

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Answer from: anrs14

#3 would be the correct answer.
explanation:
1) electronegativity, the attractive force of an atom to a pairing electron, would increase due to the octet rule (each atom tries to obtain a full valance shell)
2) atomic radius increases because the more electrons there are in the valance shell, the more attractive protons forces are required to hold them in their place. However, elements cannot loose or gain protons. Therefore, there are less attractive forces, which causes the electrons to be farther away from the protons, and thus there is a larger atomic radius.

Answer from: Quest

The grandmother cell is a hypothetical neuronthat represents a complex but specific concept or object.[1] it activates when a person "sees, hears, or otherwise sensibly discriminates"[2] a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the gnostic neuron, was proposed two years later

Answer from: Quest

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

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Which statement describes the general trends in electronegativity and atomic radius as the elements...

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